Found this after a full Windows Defender scan
Turned on my computer today and Firefox tried to open in Troubleshoot Mode. That's never happened before, so I got weirded out and ran a full scan on Windows Defender. It found this file in a folder in my system's Downloads that was apparently created in 2019. I'm very unsure if the Firefox thing and this are related (I doubt it).. but now I'm worried ofc
What it detected: "Trojan:MSIL/Zusy.SLWE!MTB" affecting "nalased.exe"
I'm an idiot and haven't dealt with many viruses, so I removed it before being able to check it with something like VirusTotal. Have I had a trojan for 7 years stealing my info? Wouldn't it have been obvious by now (suspicious banking activity, other malicious files, etc)? How could all the in between virus scans have missed it?
Or is it more likely a false positive or something?
Using Windows 10.